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November 7, 1986 AGS 8691-3 <br /> Beacon Service Station #1-502 - Lodi, California <br /> BACKGROUND <br /> The Beacon station investigated is located on the southeast <br /> corner of North Cherokee Lane and Elm Street in Lodi, California, <br /> as shown on the Site Vicinity Map (Plate P-1) . An underground <br /> storage tank cluster consisting of three 10,000 gallon tanks was <br /> present to the northeast of the station building. Two tanks in <br /> the cluster are currently being used to store gasoline, while one <br /> contained diesel fuel product prior to its removal. The <br /> approximate location of the tank cavity is shown on the <br /> Generalized Site Plan (Plate P-2) . <br /> Applied GeoSystems was present at the site during the removal of <br /> the diesel storage tank on September 18, 1986. The removal work <br /> was initiated after pressure testing of the tank showed it not to <br /> be tight. Samples taken immediately below and adjacent to the <br /> north end of the tank showed contamination with diesel fuel in <br /> excess of 1,000 parts per million (Table 1) . Details of this <br /> initial phase of our investigation are given in Applied <br /> GeoSystems ' Report, Environmental Investigation Related to Tank <br /> Removal, October 28, 1986. The monitoring wells installed during <br /> this study were drilled in response to these high levels in order <br /> to determine whether ground water had been affected. <br /> 2 <br /> A,00/led GeoSystems <br />